Tonearms that work well with better Koetsu stone body cartridges

I have an Ikeda 407, but I don't know the mass. The mass is not stated on their website or in the manual. Below quoted from the website:

"The Ikeda IT-407 tone arm is a High Mass design and has been called Big, Rigid and Beautiful."

It is a great match with my Ikeda and other cartridges that require a high mass tonearm. Seeing the Ikeda tonearm in person is different than seeing a picture. In person you can appreciate the mass and precision of this tonearm, as well as the beauty.

This whole subject is in my opinion concocted as an excuse for some guys to feel good about having bought bad arms. Instead of defining a good arm as one on which all cartridges sound good they break them down into arbitrary mass categories and say it is the users who are bad for not being able to figure out which few of the many cartridges out there will sound good on their less than good arms.

This is all so very easily avoided. Simply buy a good arm! Origin Live makes fabulous arms. I know, mine is awesome. Got a Koetsu on it right now. Never ever even bothered to look up its mass, or compliance, because these things simply do not matter when you have a good arm. Which I do. https://systems.audiogon.com/systems/8367 Because, Origin Live. https://www.originlive.com/cartridge-compliance-tonearm-effective-mass-cartridges-work-well-origin-l... Read and learn:

compliance is well down the scale of significant factors to the point of irrelevance in a good arm. You may find those who will argue with this but they always seem to relate matching issues they’ve had with other arms and not an Origin Live one.

"Compliance is well down the scale of significant factors to the point of irrelevance in a good arm." For the record, that is Mark Baker. Not me. Anyone got an issue with what we just said, take it up with Mark Baker. 😁

Here's a good read...

https://www.gcaudio.com/tips-tricks/tonearm-cartridge-compatability/

I've seen the 407 described as being in the low/mid 30's, which would definitely put it in the high mass category (if true).

DeKay

Excellent for Koetsu Stone Bodies:
Fidelity Research FR-54s & FR-64s

The FR64S sounds phenomenal with Koetsu stones; any one who’s had that combo will tell you the same. The FR64fx is also quite good if you’re on a budget. Silver vs. copper versions on these arms doesn’t matter too much; don’t stress over it. The stock 64fx base is quite good but a B-60 or Ikeda VTA-06 base is recommended for the 64S. The stock FR headshells are all pretty bad. The Koetsu deserves better. I'm partial to the Ikeda headshells (20g, very thick aluminum). Also a Graham Phantom is quite serviceable for Koetsu stones (but not as good sounding as the FRs) if that’s what you’ve got on hand.

I tried a Jade once on a Clearaudio Universal 12" and it was an awful match lol. I don't know how much of that was compliance/mass matching versus the carbon fiber arm tube material, but the Koetsu sounded like it wasn't happy. That same arm sounds GREAT with a Shelter Harmony (carbon fiber body), so there is definitely something to the arm/cart matching thing. 

The Ikeda seem like they’d be a great match too, and share lineage with the FR arms, but they will cost you a good bit more than a used FR64 series arm.